package com.hulk.dryad.manage.config;


import lombok.extern.slf4j.Slf4j;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskExecutor;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @Author: hulk
 * @E-mail: 29572320@qq.com
 * @Date: Create in 2018/9/20 下午2:43
 */
@Slf4j
@Configuration
@EnableAsync
public class ExecutorAsyncConfig implements AsyncConfigurer {


    private static final int PROCESSORS = Runtime.getRuntime().availableProcessors();
    /**
     * Set the ThreadPoolExecutor's core pool size.
     */
    private static final int COREPOOL_SIZE = PROCESSORS;
    /**
     * Set the ThreadPoolExecutor's maximum pool size.
     */
    private static final int MAXPOOL_SIZE = PROCESSORS * 2;
    /**
     * Set the capacity for the ThreadPoolExecutor's BlockingQueue.
     */
    private static final int QUEUE_CAPACITY = PROCESSORS * 3;


    /**通用线程池*/
    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(COREPOOL_SIZE);
        executor.setMaxPoolSize(MAXPOOL_SIZE);
        executor.setQueueCapacity(QUEUE_CAPACITY);
        executor.setThreadNamePrefix("asyncConfigurer-");

        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }
	/**异步任务中异常处理*/
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return (ex, arg1, arg2) -> {
            log.error("ex:{},exception method:{}", ex.getMessage(), arg1.getName());
            for (Object param : arg2) {
                log.info("Parameter value - " + param);
            }
        };
    }


//    @Bean("pushExecutorAsync")
//    public Executor pushExecutorAsync() {
//        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
//        executor.setCorePoolSize(COREPOOL_SIZE);
//        executor.setMaxPoolSize(MAXPOOL_SIZE);
//        executor.setQueueCapacity(QUEUE_CAPACITY);
//        executor.setThreadNamePrefix("pushExecutorAsync-");
//        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
//        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
//        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
//        executor.initialize();
//        return executor;
//    }



}
